* DBA (Dynamic Bandwidth Allocation) :
* DBA is a mechanism in GPON networks that dynamically allocates upstream bandwidth among ONUs based on their traffic demands.
* Functions of DBA :
* Improves upstream bandwidth utilization : DBA ensures efficient use of the limited upstream bandwidth by allocating it dynamically to ONUs as needed.
* Does not increase total upstream bandwidth : The total upstream bandwidth of a PON port is fixed and determined by the hardware. DBA optimizes how this bandwidth is used.
* Does not affect downstream bandwidth : Downstream bandwidth is shared via broadcasting and is not managed by DBA.
* Does not add more ONUs : The number of ONUs supported by a PON port depends on hardware capacity, not DBA.
* Why C?
* DBA improves the efficiency of upstream bandwidth utilization by dynamically allocating resources.
Thus, the correct answer is C .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: GPON DBA Mechanism.
* GPON Dynamic Bandwidth Allocation by Huawei.